示例#1
0
VSVideoSource::VSVideoSource(const char *SourceFile, int Track, FFMS_Index *Index,
		int AFPSNum, int AFPSDen, int Threads, int SeekMode, int /*RFFMode*/,
		int ResizeToWidth, int ResizeToHeight, const char *ResizerName,
		int Format, bool OutputAlpha, const VSAPI *vsapi, VSCore *core)
		: FPSNum(AFPSNum), FPSDen(AFPSDen), OutputAlpha(OutputAlpha) {

	VI[0] = {};
	VI[1] = {};

	char ErrorMsg[1024];
	FFMS_ErrorInfo E;
	E.Buffer = ErrorMsg;
	E.BufferSize = sizeof(ErrorMsg);

	V = FFMS_CreateVideoSource(SourceFile, Track, Index, Threads, SeekMode, &E);
	if (!V) {
		throw std::runtime_error(std::string("Source: ") + E.Buffer);
	}
	try {
		InitOutputFormat(ResizeToWidth, ResizeToHeight, ResizerName, Format, vsapi, core);
	} catch (std::exception &) {
		FFMS_DestroyVideoSource(V);
		throw;
	}

	const FFMS_VideoProperties *VP = FFMS_GetVideoProperties(V);

	if (FPSNum > 0 && FPSDen > 0) {
		muldivRational(&FPSNum, &FPSDen, 1, 1);
		VI[0].fpsDen = FPSDen;
		VI[0].fpsNum = FPSNum;
		if (VP->NumFrames > 1) {
			VI[0].numFrames = static_cast<int>((VP->LastTime - VP->FirstTime) * (1 + 1. / (VP->NumFrames - 1)) * FPSNum / FPSDen + 0.5);
			if (VI[0].numFrames < 1)
				VI[0].numFrames = 1;
		} else {
			VI[0].numFrames = 1;
		}
	} else {
		VI[0].fpsDen = VP->FPSDenominator;
		VI[0].fpsNum = VP->FPSNumerator;
		VI[0].numFrames = VP->NumFrames;
		muldivRational(&VI[0].fpsNum, &VI[0].fpsDen, 1, 1);
	}

	if (OutputAlpha) {
		VI[1] = VI[0];
		VI[1].format = vsapi->registerFormat(cmGray, VI[0].format->sampleType, VI[0].format->bitsPerSample, VI[0].format->subSamplingW, VI[0].format->subSamplingH, core);
	}

	SARNum = VP->SARNum;
	SARDen = VP->SARDen;
}
示例#2
0
文件: avssources.cpp 项目: jeeb/ffms2
AvisynthVideoSource::AvisynthVideoSource(const char *SourceFile, int Track, FFMS_Index *Index,
		int FPSNum, int FPSDen, int Threads, int SeekMode, int RFFMode,
		int ResizeToWidth, int ResizeToHeight, const char *ResizerName,
		const char *ConvertToFormatName, const char *VarPrefix, IScriptEnvironment* Env)
: FPSNum(FPSNum)
, FPSDen(FPSDen)
, RFFMode(RFFMode)
, VarPrefix(VarPrefix)
{
	VI = {};

    // check if the two functions we need for many bits are present
    VI.pixel_type = VideoInfo::CS_Y16;
    HighBitDepth = (VI.ComponentSize() == 2 && VI.IsY());
    VI.pixel_type = VideoInfo::CS_UNKNOWN;

	ErrorInfo E;
	V = FFMS_CreateVideoSource(SourceFile, Track, Index, Threads, SeekMode, &E);
	if (!V)
		Env->ThrowError("FFVideoSource: %s", E.Buffer);

	try {
		InitOutputFormat(ResizeToWidth, ResizeToHeight, ResizerName, ConvertToFormatName, Env);
	} catch (AvisynthError &) {
		FFMS_DestroyVideoSource(V);
		throw;
	}

	const FFMS_VideoProperties *VP = FFMS_GetVideoProperties(V);

	if (RFFMode > 0) {
		// This part assumes things, and so should you

		FFMS_Track *VTrack = FFMS_GetTrackFromVideo(V);

		if (FFMS_GetFrameInfo(VTrack, 0)->RepeatPict < 0) {
			FFMS_DestroyVideoSource(V);
			Env->ThrowError("FFVideoSource: No RFF flags present");
		}

		int RepeatMin = FFMS_GetFrameInfo(VTrack, 0)->RepeatPict;;
		int NumFields = 0;

		for (int i = 0; i < VP->NumFrames; i++) {
			int RepeatPict = FFMS_GetFrameInfo(VTrack, i)->RepeatPict;
			NumFields += RepeatPict + 1;
			RepeatMin = std::min(RepeatMin, RepeatPict);
		}

		for (int i = 0; i < VP->NumFrames; i++) {
			int RepeatPict = FFMS_GetFrameInfo(VTrack, i)->RepeatPict;

			if (((RepeatPict + 1) * 2) % (RepeatMin + 1)) {
				FFMS_DestroyVideoSource(V);
				Env->ThrowError("FFVideoSource: Unsupported RFF flag pattern");
			}
		}

		VI.fps_denominator = VP->RFFDenominator * (RepeatMin + 1);
		VI.fps_numerator = VP->RFFNumerator;
		VI.num_frames = (NumFields + RepeatMin) / (RepeatMin + 1);

		int DestField = 0;
		FieldList.resize(VI.num_frames);
		for (int i = 0; i < VP->NumFrames; i++) {
			int RepeatPict = FFMS_GetFrameInfo(VTrack, i)->RepeatPict;
			int RepeatFields = ((RepeatPict + 1) * 2) / (RepeatMin + 1);

			for (int j = 0; j < RepeatFields; j++) {
				if ((DestField + (VP->TopFieldFirst ? 0 : 1)) & 1)
					FieldList[DestField / 2].Top = i;
				else
					FieldList[DestField / 2].Bottom = i;
				DestField++;
			}
		}

		if (RFFMode == 2) {
			VI.num_frames = (VI.num_frames * 4) / 5;
			VI.fps_denominator *= 5;
			VI.fps_numerator *= 4;

			int OutputFrames = 0;

			for (int i = 0; i < VI.num_frames / 4; i++) {
				bool HasDropped = false;

				FieldList[OutputFrames].Top = FieldList[i * 5].Top;
				FieldList[OutputFrames].Bottom = FieldList[i * 5].Top;
				OutputFrames++;

				for (int j = 1; j < 5; j++) {
					if (!HasDropped && FieldList[i * 5 + j - 1].Top == FieldList[i * 5 + j].Top) {
						HasDropped = true;
						continue;
					}

					FieldList[OutputFrames].Top = FieldList[i * 5 + j].Top;
					FieldList[OutputFrames].Bottom = FieldList[i * 5 + j].Top;
					OutputFrames++;
				}

				if (!HasDropped)
					OutputFrames--;
			}

			if (OutputFrames > 0)
				for (int i = OutputFrames - 1; i < static_cast<int>(FieldList.size()); i++) {
						FieldList[i].Top = FieldList[OutputFrames - 1].Top;
						FieldList[i].Bottom = FieldList[OutputFrames - 1].Top;
				}

			FieldList.resize(VI.num_frames);
		}
	} else {
		if (FPSNum > 0 && FPSDen > 0) {
			VI.fps_denominator = FPSDen;
			VI.fps_numerator = FPSNum;
			if (VP->NumFrames > 1) {
				VI.num_frames = static_cast<int>((VP->LastTime - VP->FirstTime) * (1 + 1. / (VP->NumFrames - 1)) * FPSNum / FPSDen + 0.5);
				if (VI.num_frames < 1) VI.num_frames = 1;
			} else {
				VI.num_frames = 1;
			}
		} else {
			VI.fps_denominator = VP->FPSDenominator;
			VI.fps_numerator = VP->FPSNumerator;
			VI.num_frames = VP->NumFrames;
		}
	}

	// Set AR variables
	Env->SetVar(Env->Sprintf("%s%s", this->VarPrefix, "FFSAR_NUM"), VP->SARNum);
	Env->SetVar(Env->Sprintf("%s%s", this->VarPrefix, "FFSAR_DEN"), VP->SARDen);
	if (VP->SARNum > 0 && VP->SARDen > 0)
		Env->SetVar(Env->Sprintf("%s%s", this->VarPrefix, "FFSAR"), VP->SARNum / (double)VP->SARDen);

	// Set crop variables
	Env->SetVar(Env->Sprintf("%s%s", this->VarPrefix, "FFCROP_LEFT"), VP->CropLeft);
	Env->SetVar(Env->Sprintf("%s%s", this->VarPrefix, "FFCROP_RIGHT"), VP->CropRight);
	Env->SetVar(Env->Sprintf("%s%s", this->VarPrefix, "FFCROP_TOP"), VP->CropTop);
	Env->SetVar(Env->Sprintf("%s%s", this->VarPrefix, "FFCROP_BOTTOM"), VP->CropBottom);

	Env->SetGlobalVar("FFVAR_PREFIX", this->VarPrefix);
}
/// @brief Opens video
/// @param filename The filename to open
void FFmpegSourceVideoProvider::LoadVideo(wxString filename) {
	wxString FileNameShort = wxFileName(filename).GetShortPath();

	FFMS_Indexer *Indexer = FFMS_CreateIndexer(FileNameShort.utf8_str(), &ErrInfo);
	if (!Indexer)
		throw agi::FileNotFoundError(ErrInfo.Buffer);

	std::map<int,wxString> TrackList = GetTracksOfType(Indexer, FFMS_TYPE_VIDEO);
	if (TrackList.size() <= 0)
		throw VideoNotSupported("no video tracks found");

	// initialize the track number to an invalid value so we can detect later on
	// whether the user actually had to choose a track or not
	int TrackNumber = -1;
	if (TrackList.size() > 1) {
		TrackNumber = AskForTrackSelection(TrackList, FFMS_TYPE_VIDEO);
		// if it's still -1 here, user pressed cancel
		if (TrackNumber == -1)
			throw agi::UserCancelException("video loading cancelled by user");
	}

	// generate a name for the cache file
	wxString CacheName = GetCacheFilename(filename);

	// try to read index
	agi::scoped_holder<FFMS_Index*, void (FFMS_CC*)(FFMS_Index*)>
		Index(FFMS_ReadIndex(CacheName.utf8_str(), &ErrInfo), FFMS_DestroyIndex);

	if (Index && FFMS_IndexBelongsToFile(Index, FileNameShort.utf8_str(), &ErrInfo))
		Index = NULL;

	// time to examine the index and check if the track we want is indexed
	// technically this isn't really needed since all video tracks should always be indexed,
	// but a bit of sanity checking never hurt anyone
	if (Index && TrackNumber >= 0) {
		FFMS_Track *TempTrackData = FFMS_GetTrackFromIndex(Index, TrackNumber);
		if (FFMS_GetNumFrames(TempTrackData) <= 0)
			Index = NULL;
	}

	// moment of truth
	if (!Index) {
		int TrackMask = FFMS_TRACKMASK_NONE;
		if (OPT_GET("Provider/FFmpegSource/Index All Tracks")->GetBool() || OPT_GET("Video/Open Audio")->GetBool())
			TrackMask = FFMS_TRACKMASK_ALL;
		Index = DoIndexing(Indexer, CacheName, TrackMask, GetErrorHandlingMode());
	}
	else {
		FFMS_CancelIndexing(Indexer);
	}

	// update access time of index file so it won't get cleaned away
	wxFileName(CacheName).Touch();

	// we have now read the index and may proceed with cleaning the index cache
	CleanCache();

	// track number still not set?
	if (TrackNumber < 0) {
		// just grab the first track
		TrackNumber = FFMS_GetFirstIndexedTrackOfType(Index, FFMS_TYPE_VIDEO, &ErrInfo);
		if (TrackNumber < 0)
			throw VideoNotSupported(std::string("Couldn't find any video tracks: ") + ErrInfo.Buffer);
	}

	// set thread count
	int Threads = OPT_GET("Provider/Video/FFmpegSource/Decoding Threads")->GetInt();
	if (FFMS_GetVersion() < ((2 << 24) | (17 << 16) | (2 << 8) | 1) && FFMS_GetSourceType(Index) == FFMS_SOURCE_LAVF)
		Threads = 1;

	// set seekmode
	// TODO: give this its own option?
	int SeekMode;
	if (OPT_GET("Provider/Video/FFmpegSource/Unsafe Seeking")->GetBool())
		SeekMode = FFMS_SEEK_UNSAFE;
	else
		SeekMode = FFMS_SEEK_NORMAL;

	VideoSource = FFMS_CreateVideoSource(FileNameShort.utf8_str(), TrackNumber, Index, Threads, SeekMode, &ErrInfo);
	if (!VideoSource)
		throw VideoOpenError(std::string("Failed to open video track: ") + ErrInfo.Buffer);

	// load video properties
	VideoInfo = FFMS_GetVideoProperties(VideoSource);

	const FFMS_Frame *TempFrame = FFMS_GetFrame(VideoSource, 0, &ErrInfo);
	if (!TempFrame)
		throw VideoOpenError(std::string("Failed to decode first frame: ") + ErrInfo.Buffer);

	Width  = TempFrame->EncodedWidth;
	Height = TempFrame->EncodedHeight;
	if (VideoInfo->SARDen > 0 && VideoInfo->SARNum > 0)
		DAR = double(Width) * VideoInfo->SARNum / ((double)Height * VideoInfo->SARDen);
	else
		DAR = double(Width) / Height;

	// Assuming TV for unspecified
	wxString ColorRange = TempFrame->ColorRange == FFMS_CR_JPEG ? "PC" : "TV";

	int CS = TempFrame->ColorSpace;
#if FFMS_VERSION >= ((2 << 24) | (17 << 16) | (1 << 8) | 0)
	if (CS != FFMS_CS_RGB && CS != FFMS_CS_BT470BG && OPT_GET("Video/Force BT.601")->GetBool()) {
		if (FFMS_SetInputFormatV(VideoSource, FFMS_CS_BT470BG, TempFrame->ColorRange, FFMS_GetPixFmt(""), &ErrInfo))
			throw VideoOpenError(std::string("Failed to set input format: ") + ErrInfo.Buffer);

		CS = FFMS_CS_BT470BG;
	}
#endif

	switch (CS) {
		case FFMS_CS_RGB:
			ColorSpace = "None";
			break;
		case FFMS_CS_BT709:
			ColorSpace = wxString::Format("%s.709", ColorRange);
			break;
		case FFMS_CS_UNSPECIFIED:
			ColorSpace = wxString::Format("%s.%s", ColorRange, Width > 1024 || Height >= 600 ? "709" : "601");
			break;
		case FFMS_CS_FCC:
			ColorSpace = wxString::Format("%s.FCC", ColorRange);
			break;
		case FFMS_CS_BT470BG:
		case FFMS_CS_SMPTE170M:
			ColorSpace = wxString::Format("%s.601", ColorRange);
			break;
		case FFMS_CS_SMPTE240M:
			ColorSpace = wxString::Format("%s.240M", ColorRange);
			break;
		default:
			throw VideoOpenError("Unknown video color space");
			break;
	}

	const int TargetFormat[] = { FFMS_GetPixFmt("bgra"), -1 };
	if (FFMS_SetOutputFormatV2(VideoSource, TargetFormat, Width, Height, FFMS_RESIZER_BICUBIC, &ErrInfo)) {
		throw VideoOpenError(std::string("Failed to set output format: ") + ErrInfo.Buffer);
	}

	// get frame info data
	FFMS_Track *FrameData = FFMS_GetTrackFromVideo(VideoSource);
	if (FrameData == NULL)
		throw VideoOpenError("failed to get frame data");
	const FFMS_TrackTimeBase *TimeBase = FFMS_GetTimeBase(FrameData);
	if (TimeBase == NULL)
		throw VideoOpenError("failed to get track time base");

	const FFMS_FrameInfo *CurFrameData;

	// build list of keyframes and timecodes
	std::vector<int> TimecodesVector;
	for (int CurFrameNum = 0; CurFrameNum < VideoInfo->NumFrames; CurFrameNum++) {
		CurFrameData = FFMS_GetFrameInfo(FrameData, CurFrameNum);
		if (CurFrameData == NULL) {
			throw VideoOpenError(STD_STR(wxString::Format("Couldn't get info about frame %d", CurFrameNum)));
		}

		// keyframe?
		if (CurFrameData->KeyFrame)
			KeyFramesList.push_back(CurFrameNum);

		// calculate timestamp and add to timecodes vector
		int Timestamp = (int)((CurFrameData->PTS * TimeBase->Num) / TimeBase->Den);
		TimecodesVector.push_back(Timestamp);
	}
	if (TimecodesVector.size() < 2)
		Timecodes = 25.0;
	else
		Timecodes = agi::vfr::Framerate(TimecodesVector);

	FrameNumber = 0;
}
示例#4
0
/// @brief Opens video 
/// @param filename The filename to open
void FFmpegSourceVideoProvider::LoadVideo(wxString filename) {
	wxString FileNameShort = wxFileName(filename).GetShortPath(); 

	FFMS_Indexer *Indexer = FFMS_CreateIndexer(FileNameShort.utf8_str(), &ErrInfo);
	if (Indexer == NULL) {
		throw agi::FileNotFoundError(ErrInfo.Buffer);
	}

	std::map<int,wxString> TrackList = GetTracksOfType(Indexer, FFMS_TYPE_VIDEO);
	if (TrackList.size() <= 0)
		throw VideoNotSupported("no video tracks found");

	// initialize the track number to an invalid value so we can detect later on
	// whether the user actually had to choose a track or not
	int TrackNumber = -1;
	if (TrackList.size() > 1) {
		TrackNumber = AskForTrackSelection(TrackList, FFMS_TYPE_VIDEO);
		// if it's still -1 here, user pressed cancel
		if (TrackNumber == -1)
			throw agi::UserCancelException("video loading cancelled by user");
	}

	// generate a name for the cache file
	wxString CacheName = GetCacheFilename(filename);

	// try to read index
	FFMS_Index *Index = NULL;
	Index = FFMS_ReadIndex(CacheName.utf8_str(), &ErrInfo);
	bool IndexIsValid = false;
	if (Index != NULL) {
		if (FFMS_IndexBelongsToFile(Index, FileNameShort.utf8_str(), &ErrInfo)) {
			FFMS_DestroyIndex(Index);
			Index = NULL;
		}
		else
			IndexIsValid = true;
	}

	// time to examine the index and check if the track we want is indexed
	// technically this isn't really needed since all video tracks should always be indexed,
	// but a bit of sanity checking never hurt anyone
	if (IndexIsValid && TrackNumber >= 0) {
		FFMS_Track *TempTrackData = FFMS_GetTrackFromIndex(Index, TrackNumber);
		if (FFMS_GetNumFrames(TempTrackData) <= 0) {
			IndexIsValid = false;
			FFMS_DestroyIndex(Index);
			Index = NULL;
		}
	}
	
	// moment of truth
	if (!IndexIsValid) {
		int TrackMask = OPT_GET("Provider/FFmpegSource/Index All Tracks")->GetBool() ? FFMS_TRACKMASK_ALL : FFMS_TRACKMASK_NONE;
		try {
			// ignore audio decoding errors here, we don't care right now
			Index = DoIndexing(Indexer, CacheName, TrackMask, FFMS_IEH_IGNORE);
		}
		catch (wxString err) {
			throw VideoOpenError(STD_STR(err));
		}
	}
	
	// update access time of index file so it won't get cleaned away
	wxFileName(CacheName).Touch();

	// we have now read the index and may proceed with cleaning the index cache
	if (!CleanCache()) {
		//do something?
	}

	// track number still not set?
	if (TrackNumber < 0) {
		// just grab the first track
		TrackNumber = FFMS_GetFirstIndexedTrackOfType(Index, FFMS_TYPE_VIDEO, &ErrInfo);
		if (TrackNumber < 0) {
			FFMS_DestroyIndex(Index);
			Index = NULL;
			throw VideoNotSupported(std::string("Couldn't find any video tracks: ") + ErrInfo.Buffer);
		}
	}

	// set thread count
	int Threads = OPT_GET("Provider/Video/FFmpegSource/Decoding Threads")->GetInt();

	// set seekmode
	// TODO: give this its own option?
	int SeekMode;
	if (OPT_GET("Provider/Video/FFmpegSource/Unsafe Seeking")->GetBool())
		SeekMode = FFMS_SEEK_UNSAFE;
	else 
		SeekMode = FFMS_SEEK_NORMAL;

	VideoSource = FFMS_CreateVideoSource(FileNameShort.utf8_str(), TrackNumber, Index, Threads, SeekMode, &ErrInfo);
	FFMS_DestroyIndex(Index);
	Index = NULL;
	if (VideoSource == NULL) {
		throw VideoOpenError(std::string("Failed to open video track: ") + ErrInfo.Buffer);
	}

	// load video properties
	VideoInfo = FFMS_GetVideoProperties(VideoSource);

	const FFMS_Frame *TempFrame = FFMS_GetFrame(VideoSource, 0, &ErrInfo);
	if (TempFrame == NULL) {
		throw VideoOpenError(std::string("Failed to decode first frame: ") + ErrInfo.Buffer);
	}
	Width	= TempFrame->EncodedWidth;
	Height	= TempFrame->EncodedHeight;

	if (FFMS_SetOutputFormatV(VideoSource, 1LL << FFMS_GetPixFmt("bgra"), Width, Height, FFMS_RESIZER_BICUBIC, &ErrInfo)) {
		throw VideoOpenError(std::string("Failed to set output format: ") + ErrInfo.Buffer);
	}

	// get frame info data
	FFMS_Track *FrameData = FFMS_GetTrackFromVideo(VideoSource);
	if (FrameData == NULL)
		throw VideoOpenError("failed to get frame data");
	const FFMS_TrackTimeBase *TimeBase = FFMS_GetTimeBase(FrameData);
	if (TimeBase == NULL)
		throw VideoOpenError("failed to get track time base");

	const FFMS_FrameInfo *CurFrameData;

	// build list of keyframes and timecodes
	std::vector<int> TimecodesVector;
	for (int CurFrameNum = 0; CurFrameNum < VideoInfo->NumFrames; CurFrameNum++) {
		CurFrameData = FFMS_GetFrameInfo(FrameData, CurFrameNum);
		if (CurFrameData == NULL) {
			throw VideoOpenError(STD_STR(wxString::Format(L"Couldn't get info about frame %d", CurFrameNum)));
		}

		// keyframe?
		if (CurFrameData->KeyFrame)
			KeyFramesList.push_back(CurFrameNum);

		// calculate timestamp and add to timecodes vector
		int Timestamp = (int)((CurFrameData->PTS * TimeBase->Num) / TimeBase->Den);
		TimecodesVector.push_back(Timestamp);
	}
	Timecodes = agi::vfr::Framerate(TimecodesVector);

	FrameNumber = 0;
}
示例#5
0
文件: file_ffms.cpp 项目: sh0/madj2
// Constructor and destructor
c_media_file_ffms::c_media_file_ffms(boost::filesystem::path path) :
    // Path
    m_path(path),
    // File
    m_source(nullptr),
    // Info
    m_frames(0), m_rate(0), m_aspect(1), m_width(0), m_height(0)
{
    // Debug
    //std::cout << boost::format("FFMS: Opening file! path = %1%") % path << std::endl;

    // FFMS error
    m_fferr.Buffer = m_ffmsg.data();
    m_fferr.BufferSize = m_ffmsg.size();
    m_fferr.ErrorType = FFMS_ERROR_SUCCESS;
    m_fferr.SubType = FFMS_ERROR_SUCCESS;

    // Library
    FFMS_Init(0, 1);

    // Index
    FFMS_Index* index = nullptr;

    // Cached index
    auto path_index = m_path;
    path_index.replace_extension(".ffindex");
    if (boost::filesystem::is_regular_file(path_index)) {
        // Read index
        index = FFMS_ReadIndex(path_index.c_str(), &m_fferr);
        if (index) {
            // Check validity
            int result = FFMS_IndexBelongsToFile(index, m_path.c_str(), &m_fferr);
            if (result) {
                // Invalid index
                FFMS_DestroyIndex(index);
                index = nullptr;

                // Delete index file too
                boost::filesystem::remove(path_index);
            }
        }
    }

    // Create index
    if (!index) {
        // Indexer
        FFMS_Indexer* indexer = FFMS_CreateIndexer(m_path.c_str(), &m_fferr);
        if (!indexer)
            throw c_exception("FFMS: Could not create indexer!", { throw_format("path", m_path) });

        //index = FFMS_DoIndexing2(indexer, FFMS_IEH_ABORT, &m_fferr);
        index = FFMS_DoIndexing(indexer, 0, 0, nullptr, nullptr, FFMS_IEH_ABORT, nullptr, nullptr, &m_fferr);
        if (!index)
            throw c_exception("FFMS: Failed to index media!", { throw_format("path", m_path) });

        // Write index to file
        FFMS_WriteIndex(path_index.c_str(), index, &m_fferr);
    }

    // Track
    int track_id = FFMS_GetFirstTrackOfType(index, FFMS_TYPE_VIDEO, &m_fferr);
    if (track_id < 0) {
        FFMS_DestroyIndex(index);
        throw c_exception("FFMS: Failed to find any video tracks!", { throw_format("path", m_path) });
    }

    // Source
    m_source = FFMS_CreateVideoSource(m_path.c_str(), track_id, index, 1, FFMS_SEEK_NORMAL, &m_fferr);
    if (!m_source) {
        FFMS_DestroyIndex(index);
        throw c_exception("FFMS: Failed to create video source!", { throw_format("path", m_path) });
    }

    // Destroy index
    FFMS_DestroyIndex(index);
    index = nullptr;

    // Video properties
    const FFMS_VideoProperties* props = FFMS_GetVideoProperties(m_source);
    m_frames = props->NumFrames;
    if (props->FirstTime < props->LastTime && props->LastTime > 0.0)
        m_rate = (props->LastTime - props->FirstTime) / static_cast<double>(m_frames);
    else if (props->FPSNumerator != 0)
        m_rate = static_cast<double>(props->FPSNumerator) / static_cast<double>(props->FPSDenominator);
    if (props->SARNum != 0)
        m_aspect = static_cast<double>(props->SARNum) / static_cast<double>(props->SARDen);

    // First frame
    const FFMS_Frame* frame = FFMS_GetFrame(m_source, 0, &m_fferr);
    if (!frame)
        throw c_exception("FFMS: Failed to get first video frame!", { throw_format("path", m_path) });
    if (frame->ScaledWidth > 0)
        m_width = frame->ScaledWidth;
    else
        m_width = frame->EncodedWidth;
    if (frame->ScaledHeight > 0)
        m_height = frame->ScaledHeight;
    else
        m_height = frame->EncodedHeight;

    // Conversion
    int pixfmts[2];
    pixfmts[0] = FFMS_GetPixFmt("rgb24");
    pixfmts[1] = -1;
    if (FFMS_SetOutputFormatV2(m_source, pixfmts, frame->EncodedWidth, frame->EncodedHeight, FFMS_RESIZER_POINT, &m_fferr))
        throw c_exception("FFMS: Failed to set output format!", { throw_format("path", m_path) });

    // Info
    std::cout << boost::format("FFMS: width = %d, height = %d, frames = %d, rate = %.3f, aspect = %.3f") %
        m_width % m_height % m_frames % m_rate % m_aspect << std::endl;
}